linux-cve-announce - CVE-2022-49553: fs/ntfs3: validate BOOT sectors_per

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Message-ID: <2025022616-CVE-2022-49553-4466@gregkh>
Date: Wed, 26 Feb 2025 03:13:47 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: CVE-2022-49553: fs/ntfs3: validate BOOT sectors_per_clusters

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

fs/ntfs3: validate BOOT sectors_per_clusters

When the NTFS BOOT sectors_per_clusters field is > 0x80, it represents a
shift value.  Make sure that the shift value is not too large before using
it (NTFS max cluster size is 2MB).  Return -EVINVAL if it too large.

This prevents negative shift values and shift values that are larger than
the field size.

Prevents this UBSAN error:

 UBSAN: shift-out-of-bounds in ../fs/ntfs3/super.c:673:16
 shift exponent -192 is negative

The Linux kernel CVE team has assigned CVE-2022-49553 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 5.15 with commit 82cae269cfa953032fbb8980a7d554d60fb00b17 and fixed in 5.15.45 with commit 58cf68a1886d14ffdc5c892ce483a82156769e88
	Issue introduced in 5.15 with commit 82cae269cfa953032fbb8980a7d554d60fb00b17 and fixed in 5.17.13 with commit 4746c49b11b2403f5b5b07c6eac9e60663dcd9a3
	Issue introduced in 5.15 with commit 82cae269cfa953032fbb8980a7d554d60fb00b17 and fixed in 5.18.2 with commit a2b6986316a2d106f6951e76db70fa4b2fde64a9
	Issue introduced in 5.15 with commit 82cae269cfa953032fbb8980a7d554d60fb00b17 and fixed in 5.19 with commit a3b774342fa752a5290c0de36375289dfcf4a260

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2022-49553
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	fs/ntfs3/super.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/58cf68a1886d14ffdc5c892ce483a82156769e88
	https://git.kernel.org/stable/c/4746c49b11b2403f5b5b07c6eac9e60663dcd9a3
	https://git.kernel.org/stable/c/a2b6986316a2d106f6951e76db70fa4b2fde64a9
	https://git.kernel.org/stable/c/a3b774342fa752a5290c0de36375289dfcf4a260